首页|Insight into the anti-corrosion performance of three imidazo-pyridazines for Al alloy in different concentrations of hydrochloric acid solutions
Insight into the anti-corrosion performance of three imidazo-pyridazines for Al alloy in different concentrations of hydrochloric acid solutions
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Imidazo-pyridazine and Bromo/Chloro-Imidazo-pyridazines are employed as the inhibitors for Al alloy in 0.1 M HC1 and 0.5 M HC1 solutions. The electrochemical tests and adsorption model analysis revealed that three compounds are mixed-type inhibitors and Imidazo-pyridazine exhibited the best anti-corrosion performance for Al electrode in HC1 solutions by physicochemical. From electrochemical results, the best anti-corrosion efficiency is 88.1 % for Al in 0.5 M HCI with 2.0 mM IP, while the efficiency is 75.5 % for Al in 0.5 M HCI with 1.0 mM IP. The different inhibition behaviors result from the probability of the formation of AlCl_(ads) and N-onium ions. The formation of adsorption is due to the electrostatic attraction between AlCl_(ads) and N-onium ions. The surface topography test revealed that the Imidazo-pyridazine is the best corrosion barrier for Al in 0.5 M HCI. The dynamic simulation demonstrated that the inhibition molecules and protonated molecules can adsorb on the Al surface spontaneously with parallel adsorption configuration no matter in more or less CI" atmosphere.
Al alloysInterfaceAdsorptionInhibitorElectrochemistry
Xiaolei Ren、Jinwu Bai、Xingxing Gu
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Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
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